Null exception for parameter "Path" in UWP about plugin.audiorecorder

[KodeKooker]

I also found this blocking issue while using the package on UWP platform, I'm waiting for an official fix on the nuget package.

[TristanMoreau]

In the AudioRecorderService constructor, the Init() method is called to get the path of the file where the audio will be saved. Problem is this Init() partial method is async on the UWP part. When you use StartRecording(), since the Init() isn't awaited, it can cause crashes if the path is still null.

If you're willing to recompile the library, you can use this quick (and dirty) fix to make it work by using a loop checking the state of the path in StartRecording() :

public async Task<Task<string>> StartRecording ()
{
    //quickfix
    int retry = 0;
    while (filePath == null)
    {
          if (retry++ > 10)
               break;
          Task.Delay(100).Wait();
    }

    ResetAudioDetection();

    InitializeStream (PreferredSampleRate);

    await recorder.StartRecorder (audioStream, filePath);

    AudioStreamDetails = new AudioStreamDetails
    {
		ChannelCount = audioStream.ChannelCount,
		SampleRate = audioStream.SampleRate,
		BitsPerSample = audioStream.BitsPerSample
    };

    startTime = DateTime.Now;
    recordTask = new TaskCompletionSource<string> ();

    Debug.WriteLine ("AudioRecorderService.StartRecording() complete.  Audio is being recorded.");

    return recordTask.Task;
} 

You can of course adjust it to your needs as a temporary solution but, ideally, the Init() method should be awaited.

[NateRickard]

Should be fixed in #15, though I'm unable to release a package at the moment as my Windows machine needs to be rebuilt. If you need this fix, just build the project and use the DLLs directly until I have time to revisit.